Question

1/a(куб)+а(квадрат) - 1-а/а(квадрат)

Answer 1

$\frac{1}{a^3}+ a^2 - 1- \frac{a}{a^2} = \frac{1 + a - a^3 - a^2}{a^3}$

Answer 2

$\frac{1}{a ^{3}+a ^{2} }- \frac{1-a}{a ^{2} }= \frac{1}{a ^{2}*(a+1) }+ \frac{a-1}{a ^{2} }= \frac{1+a ^{2}-1 }{a ^{2}*(a+1) }= \frac{a ^{2} }{a ^{2}*(a+1) }= \frac{1}{a+1}$